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Bard part 8201-090 is an OEM DPDT control relay used in Bard wall-mount and packaged HVAC equipment to switch higher-voltage loads using a 24 volt control signal from the thermostat or control board. Rated for 3 FLA at 480V with a 24V coil, this relay helps ensure reliable staging and equipment operation when the unit calls for heating, cooling, or fan functions, and it is a common fix for intermittent operation caused by pitted contacts or a weak coil. Confirm coil voltage, contact configuration (DPDT), and the exact part number match your Bard wiring diagram before ordering to ensure proper fit and safe, correct switching performance.